[sdiy] Re: Theremin

[harry]

You might try cloning the Rol at nd D-beam (Marjan's site) or use
an ultrasonic distance measuring module (once made by Polaroid but
now widely available... might even hack one of those ultrasonic measuring
tapes...)

Or try the theremin approach. I have the Big Briar Etherwave... with the now
legendary (in my own mind) PV-1 pitch to voltage converter. Its very cool for
live playing...  OTOH If I had hands (unlike the slime mold I am...) I'd go for
the
knobs. They are easier, cheaper, and less physically stressful (simon says hands
in
mid-air...hold...wave...hold....wave...   You will look and feel like a
flightless bird!)

Let me know how the 4093 works. I'd even like a second theremin. If you use
multiples they need to be tuned so they do not interfere...

How about a lamp/photocell ???

H^) harry

Christian Oncken wrote:

> > The dreaded "soft sync" is the reason. With both
> > oscillators in one package (VERY close together and
> > sharing the power pins...) they will lock. In a
> > theremin you need to "zero beat" the oscillators...if
> > they lock you won't be able to play it very well.
> >
> > I suppose you can try to make it work... but maybe yes
> > maybe no....
> >
> > H^) harry
>
> hmmm... I thought it might be some sort of on-chip interaction betweem
> them... makes sense...
>
> However, this thing dosent have to be very precise... its intended for CV
> control of my modular.  Was hoping to build 2 or 3, so as not to have to
> turn 3 knobs, and adjust volume, all at the same time.. 1 hand waving around
> in space and 1 knob seems better to me.  :)
>
> Any ideas on HOW I might get it to work?  I already have it built on
> perfboard and dont want to abandon it as of yet... Considered building a
> couple paia kits for this... also a full theremin with pitch->CV converter,
> but thats too much work.  If somebody's has another (cheap, easy) suggestion
> I'd love to hear it.  I'll probably mess with it a little more and go ahead
> an build one with 3 seperate 4093 chips...
>
> Christian.

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